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authorStefan Reinauer <reinauer@chromium.org>2012-03-30 13:52:58 -0700
committerStefan Reinauer <stefan.reinauer@coreboot.org>2012-04-02 18:39:58 +0200
commitdc8448fd8be4768ef9d5f9b8cbcf28db0a2029be (patch)
treed4c7e2ab6cbfb649ee4421d734dddc050c8768a6
parentd40393e3903e57496afcfc88ec094ae17f0e9437 (diff)
Add a helper function to determine the number of enabled CPUs
Change-Id: Ia72926002571e0f250849fa5db048bd8b2e92400 Signed-off-by: Duncan Laurie <dlaurie@google.com> Reviewed-on: http://review.coreboot.org/821 Tested-by: build bot (Jenkins) Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
-rw-r--r--src/devices/device_util.c18
-rw-r--r--src/include/device/device.h1
2 files changed, 19 insertions, 0 deletions
diff --git a/src/devices/device_util.c b/src/devices/device_util.c
index 526490a8c1..5225938e19 100644
--- a/src/devices/device_util.c
+++ b/src/devices/device_util.c
@@ -850,3 +850,21 @@ u32 find_pci_tolm(struct bus *bus)
return tolm;
}
+
+/* Count of enabled CPUs */
+int dev_count_cpu(void)
+{
+ device_t cpu;
+ int count = 0;
+
+ for (cpu = all_devices; cpu; cpu = cpu->next) {
+ if ((cpu->path.type != DEVICE_PATH_APIC) ||
+ (cpu->bus->dev->path.type != DEVICE_PATH_APIC_CLUSTER))
+ continue;
+ if (!cpu->enabled)
+ continue;
+ count++;
+ }
+
+ return count;
+}
diff --git a/src/include/device/device.h b/src/include/device/device.h
index c097f5796b..0aea1d6087 100644
--- a/src/include/device/device.h
+++ b/src/include/device/device.h
@@ -133,6 +133,7 @@ device_t dev_find_class (unsigned int class, device_t from);
device_t dev_find_slot (unsigned int bus, unsigned int devfn);
device_t dev_find_slot_on_smbus (unsigned int bus, unsigned int addr);
device_t dev_find_lapic(unsigned apic_id);
+int dev_count_cpu(void);
/* Debug functions */
void print_resource_tree(struct device * root, int debug_level,